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1. 阅读理解
Most of
us have looked up at the stars that fill the night sky and wondered whether
we're alone in the universe. Indeed, the question of whether there's life out
there has been something humankind's been asking itself for countless years.
But thanks to China's Five-hundred-meter Aperture Spherical Telescope (FAST),
the answer to this question may come a lot sooner than we expected.
The
telescope has a huge round reflector, which measures 500 meters across and has
a perimeter(周长)of 1.6 kilometers. Because of its great
size, it would have been both difficult and inefficient to get FAST to move
like a regular telescope. Instead, FAST's designers came up with a great
solution: its surface is made up of 4450 panels which can be individually
adjusted. This clever design feature allows scientists to detect radio signals
from any angle with a great degree of accuracy. "Panels can change their
positions through connected wires and parallel (关联的)
robots. We can control their position with an accuracy of 1mm," Zheng
Yuanpeng, chief engineer of the telescope's panel project, told Xinhua News
Agency.
FAST's
engineers also had the task of finding a suitable location. As any interference
would affect its ability to detect distant radio waves, it needed to be built
in a remote area. Luckily, the perfect spot was found in the beautiful
mountains of Guizhou Province. "There are three hills about 500 meters
away from one another, creating a valley that is perfect to support the
telescope," Sun Caihong, chief engineer of FAST's construction, told
Xinhua.
And
although it wasn't yet fully operated, FAST had already made great discoveries
by October 2017. Since 1967, only around 2000 pulsars (脉冲星) have been discovered, yet FAST had detected six more by
October 2017. Once FAST is fully up and running, we may finally have the answer
to one of the biggest questions in history.
（1）What is the purpose of mentioning the question in Paragraph 1?
A . To introduce the new giant telescope.
B . To explain why there is life in universe.
C . To remind readers to think about the life in space.
D . To emphasize the question that should be answered.
（2）What can we know from Paragraph 2?
A . The telescope is made up of many panels.
B . The area of FAST is about 800 square kilometers.
C . The engineer can handle FAST's position accurately.
D . The individual panel helps scientists catch radio signals.
（3）Why was FAST built in Guizhou?
A . Because Guizhou is a remote province.
B . Because Guizhou has an ideal valley.
C . Because Guizhou has beautiful mountains.
D . Because Guizhou has the ability to build it.
（4）What does the last paragraph mainly talk about?
A . FAST's timeline.
B . FAST's future.
C . FAST's operation.
D . FAST's discoveries.
